Do Epson inkjet printers consider themselves "out of ink" after a predefined number of pages, or after the ink actually runs outs (or comes close)?
Some people claim it's a predetermined number of pages. Thus if your pages just have a little text on them, the printer will claim it is out of ink, even when the ink cartridge is still fairly full.
Other people claim it's determined strictly by the amount of ink used during printing, thus the cartridge will be always be close to empty when the printer claims it needs to be replaced.
Which is it?
Update 1: Epson Ink Cartridges 124 and 126, which work in models such as the Epson NX-430 Printer.
Update 2: Possible relevant information: http://www.epson.com/cgi-bin/Store/jsp/dlp/dynamicLanding.do?dlpId=n_1101_ink-yield-disclaimer